PRISM analysis 4kM1 averaged over 6x 6 grid boxes
X axis: regular grid with 234 0.25° steps,
first point at 124.90° W, last point at 66.65° W
Y axis: regular grid with 103 0.25° steps,
first point at 24.19° N, last point at 49.69° N

Monthly data available from Jan1895 to Dec2017 (1476 months)
Variable tdmean (monthly mean of dew point temperature) in CelsiusFull metadata.